People who become atheists do so because they got picked on in high school.
One, I knew I was an atheist long before high school. Two, I was not picked on in high school. It probably helped that I went to a private school where even the less successful students admitted to each other that they'd be considered rather nerdy in a public school.
Rummage through an atheist's emotional baggage and you will find a pile of leftover teenage angst,
You'll find that in pretty much anyone's emotional baggage.
a few cases of repressed rage at mommy and daddy,
Nope, none. My parents gave me a great childhood. My biggest source of annoyance towards them was that they dragged me to so many art museums.
and an overpowering urge to feel superior wrapped around a stupendous amount of self-loathing.
I try not to feel superior, because I know I'm not that special. I will admit to having some self-loathing moments, but I wouldn't call it a stupendous amount.
Besides, isn't it the fundie folk who desire to feel morally superior? Aren't you the ones who get through life "knowing" that because you follow the one true god's one true sect, you'll get to live in blissful eternity while everyone you consider to be wrong will burn for eternity? You even get to go on about how you're really "loving" your enemies (and to you anyone who dares to disagree with your belief is your enemy) while you constantly belittle them and make their life worse.
Plus, if you're getting into self-loathing, then I feel justified in bringing up your extreme sexual hang-ups, where you project your distress at actually having sexual desires onto everyone else and trying to bottle up others' enjoyment. If you weren't taught to hate yourself for natural instincts, I think you'd be a lot less likely to want dominion over everyone else's expression of those instincts.